Figure 3. Immunohistochemistry of ARG expression. BC tumor and normal breast tissue images are shown for the signature’s ARG-coded proteins. (A) ATF4 expression. (B) BAK1 expression. (C) BCL2 expression. (D) BIRC5 expression. (E) CCL2 expression. (F) DDIT3 expression. (G) HIF1A expression. (H) PRKAB1 expression. (I) RPS6KB1 expression. (J) TM9SF1 expression. Images were obtained from the Human Protein Atlas database (